Formula One's leading teams revived their threat to form a breakaway series on Thursday despite the sport's governing body insisting that a deal to end the long-running saga over regulations could be reached in days.

Formula One's fragile peace deal was thrown into doubt Wednesday when eight leading teams walked out of a meeting with the governing body after being told they had not been entered into the 2010 championship and would have no say on finalizing cost-cutting measures.

Formula One's governing body is suing the eight teams that have threatened the sport's future by announcing plans to create a rival series next season. The breakaway came after the teams failed to resolve their dispute over the FIA's introduction of a voluntary budget cap for next season.